Artemis 2: How NASA Is Preparing for the Health Risks of Deep Space Travel
The Future of Space Medicine: How Artemis II is Pioneering a New Era of Astronaut Health
For decades, NASA has been grappling with a fundamental question: what happens to the human body when it ventures beyond Earth’s protective embrace? As humanity prepares to return to the Moon with the Artemis II mission – currently on track to launch in the first week of February – the answer is becoming increasingly critical. This mission isn’t just about exploration; it’s a groundbreaking opportunity to understand and mitigate the health risks of deep space travel, paving the way for future missions to Mars and beyond.
The Five Primary Health Hazards of Spaceflight
According to NASA’s Steven Platts, chief scientist of the Human Research Program at NASA’s Johnson Space Center, spaceflight presents five key health challenges: radiation, isolation and confinement, distance from Earth, gravity (or lack thereof), and hostile, confined environments. The Artemis II mission, sending astronauts Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen farther from Earth than any human has gone before, will provide invaluable data on how these hazards manifest in a deep space environment.
Astronauts on Artemis II will encounter higher levels of space radiation than those on the International Space Station (ISS), travelling through the Van Allen belts and into galactic cosmic radiation. While the Orion spacecraft offers shielding, measuring radiation exposure – both inside the spacecraft and via Crew Active Dosimeters carried by each astronaut – is paramount. Galactic cosmic radiation can cause visible damage to cells and DNA.
Astronauts as Living Laboratories: The Artemis II Studies
The Artemis II crew will function as both researchers and subjects, participating in several key studies. ARCHeR (Artemis Research for Crew Health and Readiness) will investigate the impact of deep space on sleep, stress, cognition, and teamwork. Crew members will wear wristbands to monitor movement and sleep, with pre- and post-flight evaluations assessing cognitive and behavioral changes.
A novel approach to sample collection involves saliva analysis. Astronauts will use a dry-sample technique, blotting saliva onto special paper, eliminating the need for refrigeration. Saliva contains biomarkers indicating immune system function, hormones, and even viruses, allowing researchers to track stress levels via cortisol measurements. This builds upon the Spaceflight Standard Measures study, which has been collecting blood, urine, and saliva samples from astronauts since 2018 to assess nutritional status, cardiovascular health, and immunological function.
AVATAR: The Future of Personalized Space Medicine
Perhaps the most innovative aspect of Artemis II is the AVATAR (A Virtual Astronaut Tissue Analog Response) study. This involves USB-sized “organ chips” containing living human cells, designed to mimic the function of human organs. These chips were created using blood samples donated by the Artemis II astronauts, including stem cells derived from their bone marrow.
By flying these personalized “avatars” alongside the astronauts, NASA scientists can compare changes in the chips to changes in the astronauts’ bodies. This opens the door to a future where personalized countermeasures can be designed before a mission, based on an individual’s predicted response to the space environment. As Platts envisions, future astronauts could have their tissue chips flown ahead of time to identify potential issues and tailor preventative measures.
Beyond Artemis II: Trends in Space Health Research
The research initiated by Artemis II is expected to drive several key trends in space health:
- Personalized Medicine in Space: The AVATAR study exemplifies a shift towards tailoring medical interventions to individual astronauts, based on their unique biological responses.
- Advanced Biomarker Analysis: The use of saliva and other biological samples will become increasingly sophisticated, allowing for earlier detection of health issues.
- Organ-on-a-Chip Technology: Expect wider adoption of organ chips to study the effects of spaceflight on various organ systems.
- Real-Time Health Monitoring: Continuous monitoring via wearable sensors will provide a more comprehensive understanding of astronaut health during missions.
- Biomedical Innovation on Earth: Research conducted for space exploration often has applications for improving healthcare on Earth, connecting spaceflight discovery with biomedical innovation.
FAQ
Q: What is the purpose of the AVATAR study?
A: The AVATAR study aims to compare the response of human cells in organ chips to the response of the astronauts themselves in deep space, paving the way for personalized space medicine.
Q: How will Artemis II help us understand the effects of radiation in space?
A: The mission will measure radiation levels inside the spacecraft and monitor astronaut exposure, providing crucial data on how human cells and DNA respond to deep space radiation.
Q: What types of samples are being collected from the Artemis II astronauts?
A: Astronauts will provide blood, urine, and saliva samples, as well as dry saliva samples collected during the mission.
Q: What are the primary health hazards of spaceflight?
A: The five primary health hazards are radiation, isolation and confinement, distance from Earth, gravity (or lack thereof), and hostile, confined environments.
Did you know? The Artemis II astronauts donated blood platelets to create the organ chips used in the AVATAR study, making them truly personalized research tools.
Pro Tip: Staying informed about NASA’s Human Research Program (https://www.nasa.gov/hrp/) is a great way to follow the latest advancements in space health research.
Want to learn more about the groundbreaking research happening in space? Explore our other articles on space exploration and biomedical engineering. Subscribe to our newsletter for the latest updates!